Mineral modules
Connection options for AkVo mineral dosing.
Every AkVo PRO starts with pure RO water. What happens next is up to you: blend back your own tap-water minerals with the built-in screw, or connect one or more dosing modules and design the water for each machine on your bar.
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Magnesium (Mg²⁺)
Brighter, clearer, more aromatic cups. Adds hardness without the heavy scaling of calcium.
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Calcium (Ca²⁺)
Rounder body, heavier mouthfeel, sweetness. Scales hot boilers, so we use it for filter brewing.
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Buffer
Softens acidity and keeps pH stable, protecting metal parts. Too much makes coffee flat — so we dose it precisely.
AkVo PRO remineralisation with bypass
Blend back your own minerals
The +PPM− screw on the side of AkVo PRO blends a measured share of your tap water back into the RO water. Turn left for more minerals, right for softer water. Simple, with no extra parts — the mineral ratio follows your local water.
Option 1 · one dosing module
Pure water in, a precise recipe out
A dosing pump adds measured amounts of mineral concentrate to the RO water — for example magnesium and buffer. The recipe stays the same every day, whatever your tap water does.
Option 2 · Mg + buffer
One water for espresso and filter
Magnesium plus a bicarbonate buffer, sent to both the espresso machine and the filter brewer.
- Taste: magnesium brings brightness, clarity and aromatic lift; the buffer keeps acidity pleasant instead of sharp.
- Machine: no added calcium, so very little scale in the espresso boiler; the buffer also protects it from corrosion.
- Best for: bars that want one simple, versatile water line.
Option 3 · Mg + Ca + buffer
Fuller filter coffee
Magnesium, calcium and buffer, for batch brew and pour-over.
- Taste: calcium adds body, roundness and sweetness on top of magnesium’s clarity — a rich, juicy filter cup.
- Why only filter: calcium together with bicarbonate forms scale most readily in hot espresso boilers, so we keep it out of them.
- Best for: filter-focused cafés and roasteries’ tasting bars.
Option 4 · two modules
Separate water for each machine
Two modules on one AkVo PRO: magnesium + buffer for the filter brewer, buffer only for the espresso machine.
- Espresso with buffer only: smooth, balanced shots with softened acidity, and the safest water for the boiler — nothing that scales.
- Filter with Mg + buffer: bright, clear and aromatic cups.
- Best for: busy bars that tune espresso and filter separately.
Mineral dosing module
Technical data
| Filtration stages | 1 |
| Dimensions (H × W × D) | 45 × 35 × 17 cm |
| Spout height | 32 cm |
| Water connection | 1/4″ or 3/8″ tube |
| Feed water pressure | 2–5 bar |
| Feed water temperature | ≤ 20 °C |
| Operating voltage | 230 V |
| Power consumption | 30 W |
| Noise level | ≤ 35 dB |
- Carbon filter replacement once every 6 months
How far one mineral set goes
| Full mineral set · 80 ppm | approx. 1,500 L |
| Full mineral set · 100 ppm | approx. 1,100 L |
| Buffer only (espresso) · 80 ppm | approx. 1,000 L |
| Buffer only (espresso) · 100 ppm | approx. 740 L |
Based on low-mineral RO base water at about 15 ppm.
Not sure which option fits?
Tell us about your bar — we’ll suggest a configuration.
Your machines, daily volume and tap water decide the best setup. Ask the advisor or write to us.
